Is it possible to extract the database of sold goods with it?

Question

Parsing

Is it possible to extract a database of sold goods from an online store along with customer data without having administrator rights, but being just a visitor, and how to protect your own from this?

Answer 1

I so understand ssl the certificate saves from it?

Answer 2

The database of sold goods and customers can be extracted by an attacker in the event of a gross violation of security regulations during the development and deployment of the site and database. You cannot check it yourself without skills, so it is important to trust such things only to professionals. Any public information that you see on a site without an admin area can be stolen. The database of goods that you have in stock, for example.
An SSL certificate will not save here, it is used for other purposes.